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3 years ago

What fact about elements would help explain why two elements would bond with the same element in the same proportion?

Chemistry

2 answers:

madreJ [45]3 years ago

8 0

The elements are found in the same column on the periodic table.

mart [117]3 years ago

7 0

Answer:

Their electronic configuration.

Explanation:

Atomic propreties can be undestood upon analisis of its electronic configuration, because the way that electrons fill up the atomic orbitals will determine its reactivity.

So, if element X when combined with Y or Z givez XY or XZ it means that Y and Z must have the same electronic configuration.

The periodic table is made in a way that atoms with the same electronic configuration are at the same group, so Y and Z must be at the same group as well.

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Calculate the molar concentrations of H+ and OH− in solutions that have the following pH values:

Anastaziya [24]

Answer:

Explanation:

a )

pH = - log[ H⁺]

8.26 = - log[ H⁺]

[ H⁺] = 10⁻⁸°²⁶ mole / l

= 5.49 x 10⁻⁹ moles / l

[ H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / 5.49 x 10⁻⁹

= .182 x 10⁻⁵ moles / l

b )

10.25 = - log[ H⁺]

[ H⁺] = 10⁻¹⁰°²⁵ mole / l

= 5.62 x 10⁻¹¹ moles / l

[ H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / 5.62 x 10⁻¹¹

= .178 x 10⁻³ moles / l

c )

4.65 = - log[ H⁺]

[ H⁺] = 10⁻⁴°⁶⁵ mole / l

= 2.24 x 10⁻⁵ moles / l

[ H⁺] [OH⁻] = 10⁻¹⁴

[OH⁻] = 10⁻¹⁴ / 2.24 x 10⁻⁵

= .4464 x 10⁻⁹ moles / l

7 0

3 years ago

Jan Baptista van Helmont did an important experiment related to photosynthesis. He weighed a small willow tree and a pot of soil

Georgia [21]

Answer:

Explanation:

This experiment demonstrate that a plant don't need only water to grow and increase its mass.

A plant will also need nutrients located in the soil that will help it grow and increase its mass.

8 0

3 years ago

Fertilizer from an agricultural area runs off into a river. The river carries the nutrients from this fertilizer and deposits th

makkiz [27]

Answer:

i think it is oxygen

Explanation:

3 0

3 years ago

Write the mechanism of the reaction of methyl benzoate to form methyl 2-nitrobenzoate.

Igoryamba

The question is incorrect, nitration of methylbenzoate occurs at 3 position to get, methyl 3-nitrobenzoate.

This is because, in present reaction the reactant i.e. methylbenzoate, has low electron density at m-position.

Due to this, NO2+ prefentially attaches m-position to form methyl 3-nitro benzoate as the product.

A detailed reaction mechanism for formation of product is provided below.

3 0

4 years ago

Molecules are likely to dissolve in nonpolar solvents.

masha68 [24]

The answer to this is yes they are likely, true.

4 0

3 years ago